346 CONVOLVULACEAE. 



limb plaited, S-angled or 5-lobed. Filaments filiform; anthers ovate or oblong. 

 Ovary entire, 2-celled; styles separate to the base, or near it, each division 

 deeply 2-cleft; stigmas linear-filiform. Capsule 2-4-valved, 1-4-seeded. Seeds 

 glabrous. [Latin, unrolling.] About 85 species, of warm and tropical re- 

 gions. Type species: Evolvulus nummularius L. 



Erect low shrubs with small linear or scale-like leaves. 



Leaves scale-like ; calyx-lobes ovate. 1. E. squamosus. 



Leaves linear. 6-15 mm. long ; calyx-lobes lanceolate. 2. E. hahamensis. 



Prostrate, creeping or erect herbs. 



Leaves ovate, 3-6 mm. long ; plant silvery-pubescent. 3. E. Bracei. 



Leaves linear, or oblong to orbicular ; plants glabrous or 

 pubescent. 

 Leaves suborbicular to orbicular-obovate, rounded or 



notched at the apex. 4. E. nummularius. 



Leaves linear to oblong, acute or mucronate. 



Peduncles 1-flowered, very short, much shorter than 



the leaves. 5. E. sericeus. 



Peduncles filiform, elongated, 1-several-flowered, 

 mostly as long as the leaves or longer. 

 Leaves oblong-obovate, mucronulate ; sepals about 



one-third as long as corolla. 6. E. glaher. 



Leaves linear to oblong, acute or obtusish ; 

 sepals at least one-half as long as corolla. 

 Plant pilose-pubescent ; leaves oblong to ob- 

 long-lanceolate, bluntish. 7. E. alsinoides. 

 Plant sparingly pubescent or glabrate ; leaves 



linear-lanceolate or linear-oblong, acute. 8. E. linifoUus. 



1. Evolvulus squamosus Britton, Bull. N. Y. Bot. Gard. 3: 449. 1905. 



An intricately branched erect shrub, 3 dm. high or less, the slender terete 

 twigs densely appressed-pubescent. Leaves scattered, reduced to mere lanceo- 

 late-acuminate scales, 2 mm. long or less, appressed-pubescent; flowers solitary 

 in the upper axils, on appressed-pubescent peduncles, which are about as long 

 as the calyx; calyx-lobes ovate, acute, appressed-pubescent, one-half as long as 

 the white corolla, or less; corolla about 6 mm. broad, slightly 5-lobed, the 

 broad lobes a little emarginate; stamens a little shorter than the corolla, their 

 filaments filiform, their anthers oval, short; ovary densely pubescent, oblong; 

 styles 2, 2-cleft to about the middle. 



Kocky coppices and scrub-lands, Andros, New Providence, Eleuthera, Cat Island, 

 Cay north of Wide Opening, Great Guana Cay and Great Exuma : — Anegada. Re- 

 corded as E. arhuscula Poif. by Mrs. Northrop and by Dolley. Broom-bush. 



2. Evolvulus bahamensis House, Bull. Torr. Club 35: 89. 1908. 



Shrubby, erect, intricately branched, appressed-pubescent, 4-10 dm. high, 

 the branches wiry. Leaves linear, 6-15 mm. long, about 1 mm. wide, ascending 

 or appressed ; flowers axillary, solitary, on peduncles about 5 mm. long; calyx- 

 lobes lanceolate or ovate-lanceolate, long-acuminate, 2-3 mm. long; corolla 

 white, 1.2-2 cm. broad, its l^mb nearly entire; stamens nearly as long as the 

 corolla. 



Rocky plains and scrub-lands, Eleuthera, Conception Island. Watling's, Mariguana, 

 North Caicos. Ambergris Cay, Great Ragged Island. Fortune Island, Crooked Island, 

 Acklin's and Inagua. Endemic. Referred to E. arhuscula Poir. in Bull. N. Y. Bot. 

 Gard. 3 : 450, 1905 ; also by Hitchcock, by Coker and by Grisebach. Bahama 

 Evolvulus. 



3. Evolvulus Bracei House, Bull. Torr. Qub 35: 90. 1908. 



Perennial by woody roots ; stems several, 5-20 cm. long, simple or branched, 

 prostrate or ascending, appressed-pubescent with long white hairs when young. 

 Leaves close together, ovate or elliptic-ovate, 3-6 mm. long, acute or short- 

 acuminate at the apex, rounded or narrowed at the base, nearly sessile, loosely 

 long-pubescent above, densely so beneath; flowers solitary and short-peduncled 

 in the upper axils; calyx-lobes lanceolate, acuminate, about 2.5 mm. long; 



